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[libpng15] Merged pngvalid and pngtest from libpng-1.5; made compressed chunks

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after IDAT work with the progressive read code (this is a minor and
somewhat ugly fix-up; the proper fix is in 1.6).
This commit is contained in:
John Bowler
2013-12-29 10:44:25 -06:00
committed by Glenn Randers-Pehrson
parent c5568595ff
commit 71fcb39efc
7 changed files with 175 additions and 71 deletions
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11
pngrutil.c
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@@ -282,6 +282,17 @@ png_inflate(png_structp png_ptr, png_bytep data, png_size_t size,
{
png_size_t count = 0;
/* HACK: added in libpng 1.5.18: the progressive reader always leaves
* png_ptr->zstream in a non-reset state. This causes a reset if it needs to
* be used again. This only copes with that one specific error; see libpng
* 1.6 for a better solution.
*/
if ((png_ptr->flags & PNG_FLAG_ZSTREAM_PROGRESSIVE) != 0)
{
(void)inflateReset(&png_ptr->zstream);
png_ptr->flags &= ~PNG_FLAG_ZSTREAM_PROGRESSIVE;
}
/* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't
* even necessarily handle 65536 bytes) because the type uInt is "16 bits or
* more". Consequently it is necessary to chunk the input to zlib. This